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SUMMARY:Winter-to-summer transition of Arctic sea ice breakup and floe siz
 e distribution in the Beaufort Sea - Phil Hwang (Scottish Association for 
 Marine Science (SAMS))
DTSTART:20170915T103000Z
DTEND:20170915T105000Z
UID:TALK79421@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Breakup of the near-continuous winter sea ice into discrete su
 mmer ice floes is an important transition that dictates the evolution and 
 fate of the marginal ice zone (MIZ) of the Arctic Ocean.&nbsp\; During the
  spring of 2014\, more than 50 autonomous drifting buoys were deployed in 
 four separate clusters on the sea ice in the Beaufort Sea\, as part of the
  Office of Naval Research MIZ program. These systems measured the ocean-ic
 e-atmosphere properties at their location whilst the sea ice parameters in
  the surrounding area of these buoy clusters were continuously monitored b
 y satellite TerraSAR-X Synthetic Aperture Radar. This approach provided a 
 unique Lagrangian view of the winter-to-summer transition of sea ice break
 up and floe size distribution at each cluster between March and August. Th
 e results show the critical timings of a) temporary breakup of winter sea 
 ice coinciding with strong wind events and b) spring breakup (during surfa
 ce melt\, melt ponding and drainage) leading to distinctive summer ice flo
 es. Importantly our results suggest that summer sea ice floe distribution 
 is potentially affected by the state of winter sea ice\, including the com
 position and fracturing (caused by deformation events) of winter sea ice\,
  and that substantial mid-summer breakup of sea ice floes is likely linked
  to the timing of thermodynamic melt of sea ice in the area. As the rate o
 f deformation and thermodynamic melt of sea ice has been increasing in the
  MIZ in the Beaufort Sea\, our results suggest that these elevated factors
  would promote faster and more enhanced breakup of sea ice\, leading to a 
 higher melt rate of sea ice and thus a more rapid advance of the summer MI
 Z.
LOCATION:Seminar Room 1\, Newton Institute
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